In some resolution settings, you may be unable to access the store without using the 'use button' or zooming out (go to menu, options). The store is located in the top right of the casino. In the upper right corner of the room, to the right of the machine for exchanging Qi coins and next to a potted plant, stands a shady individual who offers to sell Statue of Endless Fortune for data-sort-value='1000000'> 1,000,000g. There are two tables for CalicoJack, low stakes ( data-sort-value='100'> 100) to the left and high stakes ( data-sort-value='1000'> 1,000) to the right. There are two forms of gambling available, slot machines and a variant of BlackJack, CalicoJack. To the top-left of the room is a terminal that lists multiple statistics for the player. Qi coins are used for both gambling and purchasing items inside the Casino, and aren't able to be converted back to gold. To his right is a machine to exchange gold for Qi coins, at a rate of data-sort-value='1000'> 1,000g per data-sort-value='100'> 100, or data-sort-value='10'> 10g per data-sort-value='1'> 1 value. Access is initially blocked by the Bouncer until 'The Mysterious Qi' quest is completed.

The Casino is located in the Calico Desert accessed through the back door of the Oasis.

Stardew valley wiki casino